P2622 code meaning
Throttle Position Output Circuit High
What P2622 means
P2622 means the throttle position output line sits too high, typically because it is shorted to a supply wire or the driver in the sending module cannot pull it down. The receiver would read a value resembling wide-open throttle even at idle, which can confuse shift scheduling or torque calculations. There is no public manufacturer documentation for this exact code. CARB's comprehensive component rules oblige makers to detect shorts on output circuits, and GM's short-to-power check on its crank output (impedance toward power of 0.5 ohm or less, sampled every 100 ms) shows how such a test is commonly built. Inspect for a wire rubbing against a battery or ignition feed and for back-feed through a connector. P2620 is the open line and P2621 the short to ground.
P2622 at a glance
- Check engine lightUsually not
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2622
- Stored code in the engine module
- Receiver acts as if at full throttle (harsh or late shifts)
Common causes of P2622
- Most likelyOutput wire shorted to a battery or ignition feed
- PossibleDriver in the sending module unable to pull the line low
- Less likelyBack-feed through a damaged connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Control moduleSignal output bufferWiring harness
What each part of P2622 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 22 | The exact fault in that area. |
What to do next
- Note P2622 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2622
What does P2622 mean?
P2622 means "Throttle Position Output Circuit High". P2622 means the throttle position output line sits too high, typically because it is shorted to a supply wire or the driver in the sending module cannot pull it down. It is a generic code, so it means the same on every make.
Is it safe to drive with P2622?
P2622 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2622 fail an emissions test?
Yes, it can. P2622 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2622 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P2622 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.